If a:b = 5:3 and b:c = 3:5, then a:b:c = ? MCQ with Answer and Explanation

If a:b = 5:3 and b:c = 3:5, then a:b:c = ?

A. 5:4:5

B. 4:3:6

C. 5:3:5

D. 10:6:10

Answer: Option C

Combine ratios: a:b = 5:3, b:c = 3:5 ⇒ a:b:c = 5:3:5.

This question belongs to: Maths Ratio and Proportion

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Question #1 Report Error

Two numbers are in the ratio 12:7 and their sum is 291. Find the numbers.

A. 360 and 210

B. 180 and 105

C. 160 and 120

D. 202 and 77

Correct Answer: Option B

Explanation:
Numbers = 12k and 7k. 12k + 7k = 291 ⇒ k = 15. Thus, numbers are 180 and 105.

This question belongs to: Maths Ratio and Proportion

Question #2 Report Error

If a:b = 4:7 and b:c = 7:10, then a:b:c = ?

A. 3:7:11

B. 8:14:20

C. 4:7:10

D. 4:8:10

Correct Answer: Option C

Explanation:
Combine ratios: a:b = 4:7, b:c = 7:10 ⇒ a:b:c = 4:7:10.

This question belongs to: Maths Ratio and Proportion

Question #3 Report Error

Two numbers are in the ratio 11:15 and their sum is 202. Find the numbers.

A. 77 and 105

B. 61 and 114

C. 154 and 210

D. 99 and 94

Correct Answer: Option A

Explanation:
Numbers = 11k and 15k. 11k + 15k = 202 ⇒ k = 7. Thus, numbers are 77 and 105.

This question belongs to: Maths Ratio and Proportion